Collector



(No Model.)

J. TREGONING.

OOLLBGTOR.

Patented Dec. 18, 1888. f2

N PETERS. Phato-Ulhngrlpher. Waxhinglcn. 11C

UNITED STATES PATENT Qrmcn.

JOHN TREGONING, OF LYNN, NASSAUIFSETTS.

COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 394,797, dated December18, 1888. Application filed September 12, 1888. $crial No. 285,175. 1N0model.)

To all whom it may concern.

Be itknown that 1, JOHN Tencoxrxc, a citizen of the United States,residing at Lynn, in the county of Essex and State of Massachusetts,have invented new and useful Improvements in Collector-Rings forAlternating-Current Dynamo-Electric Machines, of which the following isa specification.

My invention relates to improvements in the construction ofcollector-rings for alternating-current dynamo-machines, but moreespecially to collector-rings :for those types of dynamos which yieldheavy currents of comparatively low potential and are used forpracticing the art of electric welding, as described in Letters PatentNos. MEMO, 3%,141, and 2347,18, granted to Elihu Thomson, August 10,1880.

In apparatus, such as is known as direct electric welding-machines, inwhich the armature is the revolving portion of the apparatus and thefields are stationary, it is often difficult to collect the large lowpotential currents from the collector-rings and convey them to theclampin devices which hold the pieces of metal to be operated upon. Thepotential of such machines being extremely low and the current of suchenormous volume, it is important to have a minimum of joints or contactsbetween the terminals of the armature-windingand the collector-brushesresting on the collector-rings. At the same time such collector-ringsmust be large enough to carry these heavy currents without dangerous andwasteful heatin It is the object of my invention to provide suchcollector-rings and to facilitate and cheapen the construction of thesame.

My invention consists, briefly, in collectorrin composed of three piecesof metal, which pieces areof peculiar shape and easy construction andform a portion of my invention, as will be hereinafter :fully described.

Referring to the accompanying drawings, Figure 1 is a side view of therevolving armature of a direct-welding machine, sl'iowing my improvedcollector-rings placed on the shaft of the machine and the connectionsfrom the arinat-urewimling to these rings. Fig. 2 is a side sectionalview of my invention. Fig. 3 is an end view showing the details of myinvention, partly in section.

. they consist.

Referring to Fig. 4', F is a hollow cylinder, forming one of the threepieces of which my improved collector-rings consist.

Atf, Figs. 2 and i is a shoulder. and at f a large flange of sufficientsize to carry the heavy welding-currents conveyed to thearmature-winding \V. (Shown. in Fig. l.)

The piece F is fitted neatly over a bushing or sleeve, as shown at S inFig. 2, which sleeve is made to fit firmly to the shaft of the machine,as shown atX in Figs. 1 and 2, and insulating material, lsuch as wood ormicais placed between the sleeve S and the piece F to prevent thecurrent from being conveyed to the ground through the revolving shaft ofthe machine. The collar s, Fig. 2, prevents the sleeve S from passingcompletely through the cylinder F. After the cylinder F has thus beenplaced on sleeve S the piece F, 2 and l, is placed in position, as shownin the figures, and swured by the nut c. Insu lating material, 1', Fig.l, is placed between the cylinder F and the piece F, so that there willbe no shortcircuiting of the dynamo by the passage of the currents fromthe cylinder F to the piece F. The apparatus is now ready for the lastpiece, R, Fig. r, to be put in position. It is done by placing it on theside of the cylinder F which carries the flange f and screwing it to thepiece F, through the holes N N, as shown in the figures. This piece isalso insulated from cylinder F. The complete apparatus is shown in aside view in Fig. l and end view, Fig. I. It will be seen that thecylim'lm' F thus forms the collectorring and the two pieces F and R formthe other collector-ring, the two rings being insulated from each other,as described above.

It is obvious that the pieces F and R must be composed of material whichwill readily conduct the heavy currents, and of a size which will carrysuch currents without dangerous and wasteful heating.

It is also obvious that the shoulder F, Fig. 9, could be omitted, orcould even be turned about, making the ring of the same diameter as ringC, Fig. 1. I have found it more convenient to consi ruct mycollector-rings as Fig. lis a perspecabove described.

The terminals of the armature-winding IV, Fig. 1, are flXed to theflanges f and f in the following manner: Holes h h h are bored in theflanges f and f, as shown in Fig. 3, as many holes as may be necessaryto hold the wires IV. (Shown in Fig. 1.) The wires are then placed inthe holes and soldered firmly in, thus making a solid connection withflanges f and f, and thus with the collectorrings C and C, Fig. 1.

What I claim is 1. In collector-rings for dynamo-electric machines,conducting plates or flanges for the attaclnnent of the terminals of thearmature coil or coils, an integral connection between one of suchplates or flanges and the adjacent collecting-ring, and a connectionfrom the other such plate or flange extending to the second ring througha space or compartment made in the first ring.

2. In a dynamo-electric machine, separable collector-rings made of threemetal conducting-pieces, viz a complete ring with a conducting-extensionterminating in an expanded piece or flange for the attachment of thearmature coil or coils terminal or terminals, an incomplete ringcarrying the flange or eX- panded piece for the attachment of theterminals of the other coil or coils, and a segment of the latter ringfor fitting into and completing such ring when the parts are puttogether, substantially as shown.

In testimony whereof I have hereunto set my hand this 10th day ofSeptember, A. D. 1888.

JOIIL TREGONING.

